All cells have a protective barrier that is formed of proteins and a lipid bilayer. what is the name of this barrier? a. cytoplasm b. phospholipid barrier c. cell membrane d. cell wall

Which of the following sex and generation combinations directly produces the pollen tube of angiosperms? a) male gametophyteb) female gametophytec) male sporophyted) female sporophyte

Which represents a negative impact of technology

Need an answer asap 45 points and brainlest to the first person to answer why do scientific theories, such as biological and chemical evolution, represent the strongest explanation of the changes observed in the fossil record. must be in sentence form how can scientific theories on evolution and the fossil record change over time? must be in sentence form